Two days ago, the news that Henan Ruzhou Central Park drained 200,000 square meters of lake water to catch crocodile eels was on the hot search, because the movement was too big, and for a time people had a new understanding of the "infamous" invasive alien creatures of the crocodile eel.
Coincidentally, in addition to Ruzhou, Henan, in the past two days, there have been many news of crocodile eels.
For example, on August 27, two crocodile eels nearly one meter long and more than 20 pounds appeared in an artificial lake in a small area of Qingdao, Shandong Province.
Eventually, through the joint efforts of the owners and staff, two crocodile eels were successfully captured.
The alligator eel can be said to be a very harmful alien species, and its ecological damage is very large.
For example, its food intake is very large, and it grows rapidly, plus there is no natural enemy, if it is released in fish ponds and lakes, over time, the fish in the entire lake will be eaten clean by it, bringing great damage to the local ecology.
So apart from the alligator eel, what other destructive alien species in the world are there?
1. Asian carp
China's food culture is so rich that carp is a rare delicacy for Chinese.
"Braised carp", "steamed carp", "chopped pepper fish pieces", etc., for carp to eat, there are at least dozens of species in the mainland.
In the north of the continent, carp sold in the market also need about 20 yuan per kilogram, so carp farming is also a norm.
So why does such a delicious carp become an exotic species with huge destruction?
In fact, carp is a delicacy for Chinese, but for Americans, it is an exotic species that talks about discoloration.
It had to be from the 1960s.
After World War II, the United States became the most powerful country in the world, and Americans at that time paid great attention to the development of industry, and because of this, the United States produced a large amount of industrial wastewater at that time.
Large amounts of industrial wastewater are discharged into the Illinois and Mississippi rivers.
In order to treat sewage, the Americans introduced six kinds of fish from Asia, including bluefish, grass carp and carp, which were collectively known as "Asian carp" by Americans.
At the beginning, the diligent work of the "carp" made a great contribution to the sewage treatment in the United States, but the good times were not long.
In 1993, a massive flood in Arkansas destroyed the carp in captivity, and a large number of Asian carp were exiled to the main road of the Mississippi River like wild horses.
Then the American nightmare began.
Because there is no natural enemy, Asian carp began to breed wantonly in the United States, in our country, the average adult carp is at most about a dozen pounds, but in the United States, these carp can actually grow to nearly hundreds of pounds, almost the weight of an adult.
What is more worrying is the breeding ability of carp, generally a carp can lay thousands of eggs at a time, and its reproduction rate is quite amazing.
Not only that, but the carp is so tenacious that it can't find any rivals in the United States, so many native fish living in the same waters as it will be starved to death.
Today's Asian carp has conquered major U.S. waters, and despite many measures taken by the government, the proliferation of carp is still unstoppable.
2. Australian hare
In the mainland rabbit is not only a cute pet, but also a delicious food, mentioning the rabbit is a cute image.
But in Australia, the rabbit is not such an image in people's minds.
In Australia, rabbits are not only flooded, but also fat and strong, one by one, shaped like fat pigs.
In 1959, British colonists brought 5 European hares and 12 domestic rabbits from Europe, and they put rabbits on farms for hunting.
However, the rabbit's ability to reproduce was too terrible, and in just a few years, these dozen rabbits multiplied rapidly, growing into a large number of teams, and a large number of rabbits crossed the farm and ran into the wild.
Australia is known as the "country on the back of the sheep", sparsely populated and rich in grassland, which is suitable for herbivores such as rabbits to live and reproduce.
In just a few decades, Australia's rabbits have multiplied to a staggering tens of billions, because there are no natural enemies, rabbits burrow everywhere in Australia, and a large number of grasslands are destroyed, which has brought a devastating blow to the local ecology.
And because of the carefree life, many rabbits are very large, far from the original cute image, looking like a small pig.
In this case, the local government did its best to carry out several "human-rabbit wars", even using poisons and viruses.
Finally, after several encirclements and suppressions, the local government won a stage victory, and the number of rabbits was barely controlled within a certain range.
But despite this, the flood of rabbits also causes considerable economic losses to the local area every year.
Other invasive alien species
The mainland is one of the countries most affected by invasive alien species in the world, and more than 660 invasive alien species have been found in the country.
Among the more than 660 invasive species, more than 370 are plants and 220 are animals.
Among the plants, everyone is more familiar with the purple stem orchid, water hyacinth, ragweed, etc., and among the animals, everyone is more familiar with the Fushou snail, the Brazilian turtle, the African snail, and the alligator gar.
These animals and plants have brought great damage to the ecology of the mainland, according to statistics, the loss of the mainland every year because of the invasion of these alien species is as high as more than 200 billion yuan.
Fourth, why alien species are repeatedly banned
It is reasonable to say that separated by thousands of mountains and rivers, and even across the ocean, it should be difficult for alien species to thrive in other regions.
So how did these alien species come to the continent?
This is actually related to the wanton release of some people.
In the mainland, because of the influence of Buddhism, many people think that the release is to do good deeds and accumulate virtue, but in fact, many people do not have the harm of liberating biological species at all before they are released.
For example, like the crocodile eel mentioned at the beginning of the article, it can appear in the lake of Qingdao Community, it can run to the central park of Ruzhou, if it is not released, it is impossible to run to these places.
Although some people use the banner of accumulating good deeds and virtues, they are actually doing evil things in the name of doing good.
We cannot object to the release of life, because it is indeed a good deed.
But the release should also pay attention to science, before the release, we must also understand whether the release will cause serious damage to the local ecology, otherwise it is in the name of accumulating good deeds and virtues to do bad things.
#青岛一人工湖再捕2条鳄雀鳝 #